Compare between RDTs and Thermistors.
RTD
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Thermistor
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Made of metals like copper, platinum, nickel and tungsten.
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Made of metallic oxides such as cobalt, manganese, nickel etc.
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Have positive temperature coefficient of resistance that is their resistance increases as the temperature increases.
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Thermistors of both positive and negative temperature coefficient of resistance are available but thermistors having NTC are used, that is, their resistance will decrease as the temperature increases.
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Temperature range: -100 C to 650 C.
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Temperature range: -50 C to 300 C
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Temperature versus resistance characteristics are linear.
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Temperature versus resistance characteristics are nonlinear.
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Less sensitive to temperature than theristor
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Thermistors are more sensitive to temperature in the specified range than RTDs
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Cost is high
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Less costlier than RTD
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They have better reproducibility and low hysteresis.
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They have less reproducibility and more hysteresis.
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Relatively bigger in size.
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Thermistors are quite small in size and in shapes like washer, bead, probe, disc, etc.
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